Rebeckah answered 42 of the 60 questions correctly on a test. Which method should she use to find the percent of questions she answered correctly?

A. First, subtract 42 from 60 to find the ratio of questions answered correctly to total questions, which is 18/60. Then, add 40 to the numerator and denominator to find the percent: 58/100 = 58%.

B. First, find the ratio of questions answered correctly to total questions, which is 42/60. Then, add 40 to the numerator and denominator to find the percent: 82/100 = 82%

C. First, subtract 42 from 60 to find the ratio of questions answered correctly to total questions, which is 18/60. Then, simplify the ratio to 3/10. Finally, multiply the numerator and denominator by 10 to find the percent: 30/100 = 30%

D. First, find the ratio of questions answered correctly to total questions, which is 42/60. Then, simplify the ratio to 7/10. Finally, multiply the numerator and denominator by 10 to get 70/100 = 70%.

Question

29 October, 18:13

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Answers (1)

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Scarlett Stafford · Answer 1

D

Step-by-step explanation:

D.

42/60 (divide top and bottom by 6 to simplify)

42/60 = 7/10

7/10 = x/100

x = 70.

70%